/in/calc.cpp:154:13: error: expected expression
            / Process a number input
            ^
/in/calc.cpp:154:15: error: use of undeclared identifier 'Process'
            / Process a number input
              ^
2 errors generated.
/in/Compile/Makefile:44: recipe for target 'buildCalc' failed
make: *** [buildCalc] Error 1